10 Best Dive Sites in the Similan Islands Every Diver Must Visit

If there is a “Mecca” for scuba divers in Southeast Asia, it is undoubtedly the Similan Islands. Located in the crystal-clear waters of the Andaman Sea, this archipelago is famous for its massive granite boulders, vibrant coral gardens, and legendary underwater visibility.

Why Dive the Similans with King Andaman Scuba?

Khao Lak is the primary gateway to the Similan Islands. Choosing a local expert like King Andaman Scuba ensures you get the most out of your trip:

• Variety of Trips: From Similan Day Trips to multi-day Liveaboard Adventures.

• Professional Training: We are a PADI (External Link) authorized center offering courses for all levels.

• Expert Guides: Our team knows the secret spots for macro life and the best timing for “Big Stuff” encounters.

The Top 10 Similan Dive Sites

1. Elephant Head Rock (Hin Hua Chang)

The most iconic site in the Similans, named after a rock that resembles an elephant’s head above water. Below the surface, it’s a labyrinth of massive granite boulders forming spectacular swim-throughs.

• What to see: Look for White-tip Reef Sharks resting in the sand and schools of Batfish. Due to the currents, we recommend the PADI Advanced Open Water certification for this site.

2. Christmas Point

Located on the west side of Island 9, this site is a photographer’s dream. It features a stunning series of underwater arches and vibrant soft corals that look like festive decorations.

• What to see: Ribbon Eels, Nudibranchs, and occasionally, a Leopard Shark patrolling the deeper sandy areas.

3. Richelieu Rock (The Crown Jewel)

While technically part of the Surin Islands National Park (External Link), no Similan liveaboard trip is complete without it. Richelieu Rock is consistently ranked as the best dive site in Thailand.

• What to see: This is the best place to encounter the majestic Whale Shark. The rock is also covered in purple soft corals, harboring Seahorses and Harlequin Shrimp.

4. North Point

This site at the northern tip of Island 9 offers some of the best visibility in the Andaman Sea—often exceeding 30 meters.

• What to see: Giant Sea Fans and a dramatic seascape of boulders. It’s a great spot to see Whitetip Reef Sharks (External Link) and schools of Giant Trevally.

5. Koh Bon (Manta Ray Station)

A small island north of the main Similan group, Koh Bon is a limestone wall dive that serves as a cleaning station for giants.

• What to see: Manta Rays. Seeing these “birds of the sea” glide effortlessly along the ridge is an experience you will never forget.

6. Koh Tachai Pinnacle

A submerged pinnacle known for its “fish soup” atmosphere. The currents here bring in a massive amount of life.

• What to see: A “tornado” of Barracudas and large schools of Twin-spot Snappers. It’s an action-packed dive for those who love high-energy sites.

7. Anita’s Reef

A beautiful, relaxing reef located between Islands 4 and 5. It is the perfect spot for PADI Open Water students and photographers.

• What to see: Vast fields of Garden Eels and colorful Porcupine Pufferfish.

8. West of Eden

Located on Island 7, this site offers a perfect mix of hard coral gardens and deep-water boulders.

• What to see: Hawksbill Turtles are common here, as well as various species of Moray Eels hiding within the crevices.

9. Shark Fin Reef

A long ridge of boulders that breaks the surface like a shark’s fin. This site offers a unique landscape of canyon-like formations.

• What to see: Black-tip Reef Sharks and massive Napoleon Wrasse.

10. Boulder City

As the name suggests, this is a “city” of giant rocks located east of Island 3. It provides a rugged, adventurous feel to your dive.

• What to see: Large Pelagics and beautiful sea fans. Keep an eye out for the rare Ornate Ghost Pipefish.

Summary Table: Dive Site Comparison

Dive Site	Difficulty	Primary Highlight
Elephant Head Rock	Intermediate	Swim-throughs & Sharks
Christmas Point	Beginner-Int	Arches & Soft Corals
Richelieu Rock	Intermediate	Whale Sharks & Macro
Koh Bon	Beginner-Int	Manta Rays
Koh Tachai	Advanced	Schooling Fish & Currents

Essential Checklist for Your 2026 Similan Trip

To ensure a smooth experience with King Andaman Scuba, please prepare the following:

1. Certification Card: Physical or Digital (PADI, SSI, etc.).

2. Reef-Safe Sunscreen: Help us protect the reef by using Reef-Safe products (External Link).

3. Dive Insurance: We highly recommend specialized Divers Alert Network (DAN) (External Link) insurance for all trips.

4. Logbook: To record your amazing memories!

Conclusion: Book Your Adventure Today

The Similan Islands offer a world-class diving experience that is both diverse and awe-inspiring. Whether you are looking for a relaxing day trip or a week-long liveaboard, King Andaman Scuba in Khao Lak is ready to show you the best of the Andaman Sea.

Ready to dive in? Contact us today to check availability for the 2026 season!